The Mass Save heat pump rebate 2026 drops to 2,650 dollars a ton and cuts R410A units from the qualified list

What changes in the Mass Save heat pump rebate 2026

The Mass Save heat pump rebate 2026 schedule takes effect 1 January 2026. Mass Save is the energy efficiency program Massachusetts electric and gas utilities run together. A heat pump is an electric machine that moves heat into a home in winter and out of it in summer, replacing a furnace or boiler that burns fuel. The 2026 whole home rebate pays 2,650 dollars for every ton of heating and cooling capacity a system installs, capped at 8,500 dollars for the whole home, according to the rebate page Mass Save publishes. A ton is the unit installers use to size a heat pump to a house, not a measure of weight. A partial home installation pays 1,125 dollars a ton under the same 8,500 dollar cap, and the smallest tier, a basic rebate, pays 250 dollars a ton up to 2,500 dollars.

According to SumZero Energy Systems, an HVAC contractor that tracks the program, the 2025 whole home rate paid 3,000 dollars a ton capped at 10,000 dollars, and the 2025 partial home rate paid 1,250 dollars a ton. That makes the 2026 cut 350 dollars a ton and 1,500 dollars off the per home cap for a whole home system, a 12% cut to the rate and a 15% cut to the cap, this site calculation on the contractor figures. The same contractor states that an installation completed by 31 December 2025 still qualifies at the 2025 rate.

Why an R410A heat pump earns no rebate at all after 1 January 2026

The qualified product list Mass Save publishes states that as of 1 January 2026, new residential and light commercial heat pump systems with a global warming potential above 700, a measure of how much a refrigerant warms the atmosphere compared with carbon dioxide, including any system that uses R410A refrigerant, are removed from the list entirely. That means an R410A system installed after that date earns no Mass Save rebate at any tier, not even the 250 dollar basic rebate, because it no longer appears on the list at all rather than qualifying at a lower rate.

The federal rule that came a year before the cutoff Mass Save set

The Environmental Protection Agency, the federal regulator, already set the same 700 global warming potential limit for residential and light commercial heat pump systems under its own technology transitions rule, with a manufacturing and import compliance date of 1 January 2025 and an installation compliance date the same day, a full year before Mass Save removed R410A from its own list. That federal rule carries an exception, stating no installation compliance date applies to a system whose parts were all manufactured or imported before 1 January 2025, so a dealer holding existing R410A stock could still install it legally under federal law alone after that date. The cutoff Mass Save set a year later closes that gap for anyone who still wants a rebate, whether or not the unit remains legal to install under federal law by itself.

Why Massachusetts is watching heat pump incentive spending closely

The Mass Save plan for 2025 to 2027, filed with the state Department of Public Utilities, proposed spending about 5 billion dollars, a 22% increase over the prior 3 year plan, and set a target of 120,000 households installing heat pumps, up from just 30,000 households between 2020 and the first half of 2023.

We are trying to be protective and careful about how we're using ratepayer funds for program incentives.

Kate Peters, director of residential energy efficiency at Eversource, one of the utilities that runs Mass Save. Source 5.

So maybe they see a bit of a cost increase, but that's worth it to them for the other benefits of a heat pump, like cleaner air.

Kate Peters, director of residential energy efficiency at Eversource, one of the utilities that runs Mass Save. Source 5.